Six-dimensional seismic wave measuring device based on composite interferometer

A technology of measuring device and interferometer, which can be used in measuring device, geophysical measurement, seismology, etc., and can solve problems such as being susceptible to temperature interference and affecting measurement accuracy.

Active Publication Date: 2020-06-19
HARBIN ENG UNIV
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Problems solved by technology

Such as an ultra-short baseline conformal column structure optical fiber displacement sensor and optical fiber strain gauge (CN201210381978.8); a short baseline differential laser strain gauge (CN201210381976.9); an ultrashort baseline differential disc optical fiber displacement sensor and Optical fiber strain gauge (CN201210381977.3); two-dimensional high-precision combined interference fiber integrated accelerometer (CN101865935A); a rotational seismic wave measurement device based on a composite int

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  • Six-dimensional seismic wave measuring device based on composite interferometer
  • Six-dimensional seismic wave measuring device based on composite interferometer
  • Six-dimensional seismic wave measuring device based on composite interferometer

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[0054] The following is a further description of the six-dimensional seismic wave measurement device based on the composite interferometer of the present invention with reference to the accompanying drawings:

[0055] The six-dimensional seismic wave measurement device based on the composite interferometer of the present invention includes a sensing housing 12, a sensing module 13, a dual-polarization composite interference optical path 14, a photoelectric conversion module 15, and a data acquisition and processing module 16;

[0056] The 1550nm light source 112 and the 1310nm light source 113 are respectively injected into the dual-polarization composite interference optical path 14 and the sensing module 13 through the first flange 126 and the second flange 127 at the bottom of the sensing housing 12, and the interference signal is converted into by the photoelectric conversion module 15 The electrical signal is sent to the data acquisition card 161 through the angular velocity ou...

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Abstract

The invention provides a six-dimensional seismic wave measuring device based on a composite interferometer. The device comprises an optical fiber sensing shell 12, a sensing module 13, a composite interferometer 14 and a photoelectric conversion module 15, a data acquisition processing module 16; a light path of the composite interferometer 14 mainly comprises light source input; a circulator 143,couplers 144, 146, 147, 148, 148, 149, 149. a polarizer 142, a wavelength division multiplexer 145. A Mach-Zehnder interferometer and Sagnac interferometer composite optical structure is adopted, theinfluence of temperature on measurement is eliminated through double polarization maintaining optical paths, six-dimensional measurement of seismic waves is achieved through a mandrel type integratedstructure, and the miniaturization design of the optical fiber seismometer is achieved.

Description

technical field [0001] The invention relates to a seismic wave measuring device, in particular to a seismic wave measuring device based on an optical fiber interferometer. Background technique [0002] Seismic observation is a frontier field related to the safety of people’s property. The traditional understanding of earthquakes is based on the elastic model, and it is believed that seismic waves are transverse waves. With the continuous development of seismic observation technology, modern earthquake theory believes that seismic waves include not only translational components, but also Therefore, to completely describe and analyze the deformation information of geological structures caused by earthquakes, it is necessary to obtain accurate, fine, and real full-dimensional seismic wave information. The rotating seismic wave can provide not only the observation information of deep earthquakes, but also the complete real waveform information of near-field earthquakes. It can o...

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Application Information

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IPC IPC(8): G01V1/18
CPCG01V1/184
Inventor 苑勇贵李晋田帅飞张毅博祝海波安然姜富强张晓峻杨军
Owner HARBIN ENG UNIV
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